EGSB-MBR组合工艺处理糖蜜发酵废水效能研究

中国环境科学2015，35(5)：1416-1422ChinaEnvironmentalScienceEGSB—MBR组合工艺处理糖蜜发酵废水效能研究高靖伟，赫婷婷，程翔，封莉，张立秋(北京林业大学环境科学与工程学院，北京市水体污染源控制技术重点实验室，北京100083)摘要：实验采用厌氧膨胀颗粒污泥床(EGsB)反应器与好氧膜生物反应器(MBR)组合工艺对糖蜜发酵废水进行处理．重点考察了组合工艺对发酵废水的处理效能，包括甲烷的产生效率、污染物(COD、NH4—N和TN)的去除效能．实验结果表明：控温条件T[(35+1)'Cl、进水COD约为2250mg／L、pH在为6．0左右时，EGSB对发酵废水的COD去除率可达75．6％，甲烷的容积产气速率为0．48m／(m‘d)．MBR在溶解氧(DO)为1~2mg／L左右时，采用曝气一搅拌交替运行方式处理EGSB出水，可以实现同步硝化反硝化，并且在曝气3h_搅拌1h交替运行条件下,NH4-N、TN去除率分别为85．13％、58．57％，而最终COD去除率达到85％．关键词：发酵废水；膨胀颗粒污泥床；膜生物反应器；同步硝化反硝化中图分类号：X703．1文献标识码：A文章编号：1000—6923(2015)05—1416—07PerformanceofthecombinedEGSB．MBRreactortreatingfermentationwastewater．GAOJing-wei，HETing-ting，CHENGXiang，FENGLi，ZHANGLi-qiu’(BeijingKeyLaboratoryofWaterPollutionControlTechnology，CollegeofEnvironmentalScienceandEngineering，BeijingForestryUniversity，Beijing100083，China)．ChinaEnvironmentalScience，2015，35(5)：1416~1422Abstract：Thefermentationwastewaterwastreatedbyalab-scaleprocesscombinedwithanaerobicexpandedgranularsludgebed(EGSB)andmembranebioreactors(MBR)．Theperformanceofthecombinedtreatmentprocesswasstudiedinthispape~includingmethanegasproduction，thepollutantsremovaleficiency．TheresultsshowedthatEGSBWasefectiveinremovingtheorganicpollutantsofthefermentationwastewaterundermesophiliccondition(35~1℃)andthepH6．0．CODremovalratereached75．6％andthemethanevolumetricgasproductionratewas0．48m／(m3~d)whentheinfluentCODwasaround2250mg／L．TheMBRsystemadoptedcontinuously-fedandaeration-stiralternateoperationtotreatthefermentationwastewaterafterbeingdisposedbytheEGSBreactor．Thesimultaneousnitrification-denitrification(SND)wasrealizedunderdissolvedoxygen(DO)l~2mg／L．ThebestperformanceforTNremovalwasachievedundertheaeration3h-stirringlhoperatingconditions，whilemeNH4+_NandTNremovaleficiencywere85．13％and58．57％respectively．FinallytheCODremoveeficiencyofthecombinedtreatmentprocesswasabout85％．Keywords：fermentationwastewater；expandedgranularsludgebed；membranebioreactors；simultaneousnitrification-denitrifjcation糖蜜因其提取方便、成本低廉，常被当做原料用于发酵行业[1】．而糖蜜发酵的废水基本有两种；即高浓度发酵废液(